Q. Overall heat transfer co-efficient of a particular tube is U1. If the same tube with some dirtdeposited on either side has coefficient U2, then (Solved)
1. U1 = U2
2. U2 > U1
3. U1 > U2
4. U1 = dirt factor - U2
- a. U1 = U2
1. U1 = U2
2. U2 > U1
3. U1 > U2
4. U1 = dirt factor - U2